Even if that guy wasn't a 'rapist' per say...
... and he still say physically attacked and spoke this dirtily to his female victim, I would still be incredibly shocked, appalled, disgusted and offended by his actions, especially all those "references" in a very derogatory way he made about a woman's particular body part etc. That dialogue alone shocked me.
And if I was to witness it I personally feel like I would've intervened. Seriously, the de-facto prejudice and downright hatred that some people have and feel like that for others, my heart weeps.